Korematsu v. United States is a landmark Supreme Court case from 1944 that upheld the government's decision to intern Japanese Americans during World War II, based on the claim of national security. This case raises significant questions regarding civil liberties in times of war, the balance between individual rights and governmental powers, and the implications of racial discrimination under the guise of national security. It serves as a pivotal example of judicial interpretation of constitutional rights and the extent of executive power during crises.